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Astronomy Picture of the Day
X-Rays from the Perseus Cluster Core
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#82457
by
[z]Barbara Harris
@
09.12.2005 00:00
- nach oben -
X-Rays from the Perseus Cluster Core
Explanation:
The Perseus Cluster
of thousands of galaxies,
250 million light-years distant, is
one of
the most massive objects
in
the Universe
and the brightest galaxy cluster in the
x-ray sky
.
At its core lies the giant
cannibal
galaxy Perseus A
(NGC
1275)
, accreting matter as
gas and galaxies
fall into it.
This deep
Chandra
Observatory x-ray image spans about 300,000 light-years
across the galaxy cluster core.
It shows
remarkable details
of x-ray emission from the monster galaxy and
surrounding hot (30-70 million degrees C) cluster gas.
The bright central source is the supermassive
black
hole
at the core of Perseus A itself.
Low density regions are seen as dark bubbles or voids,
believed to be generated by cyclic outbursts of activity
from the central black hole.
The activity creates pressure waves -
sound waves on a cosmic scale
-
that ripple through the x-ray hot gas.
Dramatically, the blue-green wisps just above centre in the
false-color view are likely x-ray shadows of
the remains of a small galaxy falling into the burgeoning
Perseus A
.
Credit & Copyright